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If specific heat of a substance is infin...

If specific heat of a substance is infinite, it means

A

heat is given out

B

heat is taken in

C

no change in temperature takes place whether heat is taken in or given out

D

all of these

Text Solution

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The correct Answer is:
C
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How much heat (in joule) is required to raise the temperature of 205 g of water from 21.2^(@)C to 91.4^(@)C . Specific heate of water is 4.18 J g^(-1) .^(@)C^(-1) Strategy : The specific heat of a substance is the amount of heat required to raise the temperature of 1g of the substance by 1^(@C . Thus Specific heat = (("Amount of heat in joules"))/(("Mass of substance in grams")("Temperature change in" .^(@)C)) Rearrangement gives. Amount of heat (q) = Mass of substance (m) xx Specific heat (c ) xx Temperature change (Delta T)

Assertion : Specific heat of any substance remains constant at all temperatures. Reason : It is given by s= 1/m * (dQ)/(dt) .

If specific heat capacity of a substance in solid and liquid is proportional to the temperature of substance, then temperature Vs time plot for the substance is best present by [Assume heat is supplied to substance at constant rate and initial temperature is less than melthing pint of substance.

NTA MOCK TESTS-NTA NEET SET 49-PHYSICS
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  5. Two spheres of same metal have the same volume. But one is solid and t...

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  8. The distance travelled by a particle is proportional to the squares of...

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  9. The range of a projectile, when launched at an angle of 15^(@) with...

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  10. A 60 kg body is pushed with just enough force to start it moving acros...

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  11. A metal ball hits a wall and does not rebound whereas a rubber ball of...

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  12. Two spherical bodies of masses m and 6m and radii R and 2R respectivel...

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  13. A solid cube of the edge a is molten and moulded in eight identical sm...

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  14. A projectile is fired with velocity.v0 at an angle 60^@ with horizon...

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  15. Show here are the velocity and acceleration vectors for an object in s...

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  16. A comet of mass 10^(8) kg travels around the sun in an elliptical orb...

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  17. A planet revolves in elliptical orbit around the sun. (see figure). Th...

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